The average of 9 consecutive numbers is 20. The smallest of these numbers is :
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. 16.
Let smallest = x
Numbers: x + x + 1, x + 2, x + 3, x + 4, x + 5, x + 6, x + 7, x + 8 = 9x + 36
Sum of 9 numbers = 20 × 9 = 180
According to the question,
⇒ 9x + 36 = 180
⇒ 9x = 144
⇒ x = 16